My display quit working on my 1988 F 250 radio although the radio continued to work fine. I took it apart and found that the lamp behind the display is burned out. Where can I get a replacement lamp? Does anyone know what the lamp number is? It has a wedge type base. Thanks, Jim P.

 

Go to the autoparts store and get a 73 or a 74 bulb. See the fix below as I just did this last night on my 88 F250, although I used a mustang radio with a cassette instead of the stock am/fm only.

https://www.ford-trucks.com/forums/5...o-display.html